As a workaround one could try to test if changing the clocksource helps. 
Command: gksu gedit /etc/default/grub
Change line: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"
to: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash clocksource=jiffies"
sudo update-grub
sudo reboot

This was presented in bug #882566 comment #6:
https://bugs.launchpad.net/ubuntu/+source/alsa-
driver/+bug/882566/comments/6

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https://bugs.launchpad.net/bugs/879790

Title:
  Sound doesn't play properly after upgrade from 11.04->11.10

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